Diaphragm pump



Filed May 25, 1956` :s sheets-sheet@ 3 K l l 3 K F .j

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Feu?, 1939. H- H, LOGAN 2,146,123

DIAPHRAGM PUMP H; H. LOGAN DIAPHRAGM PUMP Feb. 7, 1939.

Filed May 25, l 936 3 Sheets-Sheet 2 NNW m .RN wk \viT.

H. H. LOGAN DIAPHRAGM PUMP Feb. 7, 1939.

Filed May 25, 1936 3 Sheets-Sheet 3 0 Q1 120 115 103 10.5 05 @6,98119116 102 1oz 106 k95 u By 0M, 05M

Patented Feb. 7, isser-- oNiT-pfsTATEs'-PATEN'I" OFI-ics f EngineeringCo., Chicago, Ill., a corporation of .Illinois i Application May. z5,1636, sensi No. 81,666

' sciaims. (ci. 10s- 150) 'This invention .relates to diaphragm pumps',necessary on reciprocating pumps on account and'is particularlyconcerned with the provision of the intermittent 'action o f the pumpsof the '.of an improved diaphragm pump which is adaptprior art.

ed to be used for pumping under. the most dimcult Another object is thevprovision of an improved -5 conditions. vIt .should be understood,however, drive mechanism for diaphragm pumps, by means 5 that thepresent pump 'is capable of Ageneral apof'which a multiplicity ofdla'phragms may be diplication and ma beused for any type of servicerectly operated from a single crank pin, produe`l Where itscharacteristics may seemdesirable. ing a substantially even torque forthe driving one of the objects. of the'invention i5 the promotor bydistributingthe work evenly throughout 10 vision'of animpxiovd pumpparticularly adapted the entire cycle of revolution of the crank'. 10

t' the Dumping Qf gritty materials orl dirty water Another` object isthe provision of an -improved or, for chemicals `winch would be damagedby con; valve arrangement for pumps. by means of which tact with:lubricants or paokings in other typesof the seats for ball valves arequickly and firmly pumps. I secured in place and the ball valves areadapted ,l Another object of the inventior'iis the pro'viskm to beremoved with the 4valve seat with a mini- 15 of improved pump which isadapted to. pump mum emuni Of'dlflleulty.

water carrying a considerable amount of foreign Another object .iS theDI'OViSlOIl 0f all lmPIOVed matter, such as might be the case in pumpingdrive mechanism fOi reciprocating Dumps bl' water out of sumps and inywhich the pump'is' means of whicnthe expensive-and complicatedparticularly4 adapted to' be 'cleaned with. thencormecting-rod devices0f the Prierfert; usually 20 greatest of ease, I necessary to drivea'multiplicity of independent v Another object or theinvention is cheprovision pumping members from 'e Single crank pin. have of .imimproved-num'plwmch. is adapted for the been eliminated. This has beenaccomplished by pumping of foodstuifamedicines, or any uids or. the-usefWhatl Prefer i0 Cell e floating eenowabie maieriai intended foi-,humanconsunp- Centric?, which permits satisfactoryoperationen tion, in whichcontact withioreign' materials eveil lf the Darts Shouldbe Slightly01111l 0f align- :would be detrimental to4 the material beingment-through inaeurey of manufacture, and j 'pmnped, .also-permits, theremoval of any of the driven l Another object is the provision 'o1'animproved membelsin' Very Simple manner..

pump of the diaphragm type, which is lso conl' 'Ammer ebieclilisthe-Provision 0f an improved 30 structed .as tol eliminate-high and -low.torque drive meeheliism. including Such e floating ecvalues, excessive.vibration.- and whicnproduces 1' centrif sci-arranged .that the wearonthe rollers a substantially steady iiowfromthe discharge,x c'arrled bythe cross-heads, which actuate each 1 Another 'Objectis the( provisionof an improved separate pumping element. is greatly reduced andv sspum'pof the diaphragm type which iseconomicai j the rotationtakes placebetween the .fi0atins a5 .in the amount of floor space occupiedanawhich.'eeeentrio and .the crank pin upon which the requiresbutarelativelysmallfoundation. j v floating eccentric is-mounted, bylmeans of `dummer object is the provisin of an improved suitableantifriction bearings at that point. ump 0f V(-,h'e diaphragm type..mwah-ange@ that, Another object is the provision of an improved 4o. theaction 'of the pumpcauses aconstantnowci diaphragm pump constructionwhich iS sturdy. 4o .nquid through the maniflds, thereby tending 'toe'lcient, andiwhich is characterized by economy carry sediment alongwith' the liquid and to keep in themanufacture and machining of thevarious .it in suspension in the .water,/ and eliminating partsby-virtue ofthe fact' that many of theele- Athe clogging'of lthemanifoldfand otherh'arxibers;- ments 'are exact duplicates so thattheymay be 45 Another object isthe provision o f an improvedvconstructed ln production on avolume basis at a 45 pump construction ofthe diaphragm `type, in comparatively low cost.

which all ofthe parts are accessible for repair or Other objects andadvantagesof the invention replacement, and in .which'the valves arecapable will be apparent from the following description of easy 'removal'for cleaning or other' service. and theaccompanying drawings, in whichsimilar i `Another object is the provision of an improved characters .ofreference indicate similar parts 50 l' pump o fthe diapragm type.'having a, substantial throughout .the several views.

i -ly constant flow, thereby eliminating the uneven Referring .to thethree v'sheetsof drawings ac- 'Ioadvon the d rlveshaft which is presentin the companyingthe specication: devices "Q12 the prior fart, andeliminating the F1g. 1 isa .top plan View of a pump constructed 55necessity [for air 'chambers-which 'are usually according to the presentinvention; -55

Fig. 2 is a side elevational view of the pump;

Fig. 3 is a vertical sectional view, taken on the plane of the line 3-3of Fig. 1, looking in the direction of the arrows, showing the detailsof constr'uction of the mechanism;

Fig. 4 is a fragmentary sectional view, taken on the plane of the line4-4 of Fig. 3, in` partial section, showing lthe details of constructionof thetcross heads, floating eccentric and associated par s; l

Fig. 5 is a vertical sectional view, taken through one of the crossheads on the plane of the line 5-5 of Fig. 4, showing the details ofconstruction-of the cross head and its supporting guides; f

Fig. 6 is a fragmentary sectional view, taken on the plane of the line6-6 of Fig. 3, looking in the direction `of the arrows;

Fig. '7 is an enlarged detail view of one of the stub shafts |09 whichis used to connect each cross head 24 to the iioating member I4`1.

The present pumpis adapted to be driven by i means of a belt andpulleys, since the drive shaft is arranged for a convenient and suitabledrive speed, or it maybe driven by means of a gear motor, as shown inFig. 2.

The gear motor I3 comprises an electric motor I I of suitablecharacteristics, having an auxiliary gearhousing I2 containing reducinggears and adapted to deliver power at the shaft I3 at a re1- ativelyslow speed and relatively high torque. The gear motor drive shaft I3 isconnected to thehorizontal pump drive shaft I4 by a suitable form ofuniversal joint I5. .The supporting and housing structure of the pump ispreferably conlstructed of cast metal and comprises a plurality y ofcast metal parts, as follows: f

The base'I6, supporting spider I1, intake manifold I8, dischargemanifold I9, intake valve housings 2U, pump housings 2l, discharge valvehousings 22, diaphragm heads 23, cross heads 24.

Of these, the intake valve housings and the discharge.V valve housingsmay be identical in` structure, differing only in their location withrespect to the pump elements of the complete pump, and they are given aseparate indicating numeral only because of their diierent function "inthe operation of the pump. Of course, the

valves operate in the same way whether they are used as intake valvesorv output'valves, but they operate at different times, as will beapparent from the following description of the structure and operation.

The base I6 comprises a cast-metal member having a substantiallycylindrical side wall portion 25, supporting a'frusto-conical side-wallportion 26 for the purpose of reducing the size of the base at the pointwhere it supports the spider I1. The cylindrical base part 25 is carriedby a foot flange 21 suitably reinforced and provided with apertures sothat the base may be bolted to a concrete foundation.

At one side the cylindrical portion 215 is provided with a flattenedseat or surface 23 bordering a cylindrical l bore 23 and provided withthreaded bores 33. The bore 29 is adapted to receive the bearing casting3l for the horizontal drive shaft attaching flange 33 through which thescrew bolts 34 pass into the threaded bores 33 to se.

curethe fitting on the base.

The cylindrical flange-32 is providedk with a of the shaft at thatpoint.

I4. This bearing casting has a cylindrical flange 32 bordered by aradially projecting 31 is seated. The outer 'race 31 may be a closefrictional fit in the bore 35. An inner race 33 has a close frictionalfit on the portion 33 on the horizontal drive shaft I4, and the taperedfrusto-conical anti-friction rollers 43 arel disposed between the races31, 38. The raceways in the races 31, 33- are disposed diagonally to theaxis of shaft I4 so that the anti-friction bearings 31, 33, 40 alsoconstitute a thrust bearing for taking the thrust from the bevel pinion4| carried bythe end of drive shaft I 4.

The drive shaft bearing casting 3| has a taperedfrusto-conical portion42, and it terminates.,

in a cylindrical flange 43 having a counterbore 44. which is adapted toreceivean anti-friction The race 33 rests against the shoulder at theright end of the bevel pinion 4I, while the race a pair of nutsc46threaded on a threaded part .The bearing 45 need not be as large as thebearing 31, 33, 43, as it does not take the direct thrust from the bevelpinion 4jI. The bearing 45 and nuts 46 are covered by a cast metal cap41, which has a groove surroundingthe shaft I4, filled with a packing.48 to prevent egress of lubricant from the casting 3|. A threadedfilling aperture at the top of the casting may be closed by a fillingplug 49 so that lubricant may be applied to the bearings from thisfilling aperture.

The base 25 is hollow and formed with a bore 50 and counterbore 5Iseparated by an annular The annular shoulder 52 is enshoulder 52. gagedby the attaching flange 53 of a bearing plate 54, which carries thelower bearing 55 for the main or drive shaft 56.

The bearing plate 54 is bolted yto as shown, and has a counterbore 51and an an- A nular flange 58 for receiving and supporting theanti-friction bearing 55, which is 4mounted in its socket and on thelower end of shaft 56 in a manner similar to the anti-friction bearingsvjust described, by means of nuts 59' on threaded vfor seating the bevelgearl 61, which is secured in place by a plurality vof nuts 63 on thethreaded portion 69. Bevel gear 31 meshes with bevel pinion 4I so thatshaft 56 is driven at a reduced speed. Y f

The present pump may include any number of pumping elements, butpreferably includes four, five, six or more of such pumping elements. Inthe preferred embodiment of the invention there are six separate pumpingelements, which may be indicated in Eig. 1 by the numerals 1II-15.

In any event, the pumping. elements are ar ranged 'radially at equallyspaced distances about the axis of the d rive shaft 56, and they areadapted to be actuated in succession in the direction in which the shaftrotates. be vrotated in either direction to operate the pumping elementswith equal facility.

the base The drive shaft may 0 of the bearing 45 is forced on the shaftI4 by 2 f ach ofthe pumping elements is identical' in y structure toeach of the other pumping elements,

thereby greatly' reducing the cost of manufacture, since onlyv one typeof pumping element v need be made, and it can be made in largequantities by volume production machining methods. It is to beunderstood that lthe present embodiment, which has six pumping elements,is exemplary of one of the preferred forms of the invention and that.other embodiments vmay -be made embodying a multiplicity of pumpingele-v .threaded bores 19 for receiving the screw bolts 80.

The hexagonal portion has a supporting shoulder 8| formed on a radiallyoutwardly extending flange 82 at the bottom to givevadditional supportto the spider |1, which may be formed of a multiplicity of separate arms83. Each of these arms has a fiat end surface 84 located on attachingflanges' 85, through which a multil plicity of the Afastening bolts 80pass, the bolts being threaded into the flanges 11, 18 on base Iii. Thespider arms 83 are all secured to the t base vIii in such manner thatthey extend radially therefrom at the top, and they are providedr withsuitable reinforcing flanges such as the vertical flange 86, thehorizontal flange 81, and the curved border ange 88, joined by vari- 1ous webs to make a light and strong structure.

. These spider arms 83 are shown in elevation at. the right of Fig.3,'and in section at the left of Fig. 3. Near the outer end of each arm83 the arm is provided with a horizontal machined seating. surface 89,which is bordered by a flange 90 to assistin aligning the pump elementon the spider, and to support the pump chamber against the thrust of theworking parts.

The horizontal flanges 81 have apertures for receiving the securingbolts 9|, which pass vthrough the spider arm flanges, andare secured bynuts which nestle in recesses at opposite sides of pump chamber 2|.

The spider arms v83 also have upwardly ex- .tending guide-supportingflanges 92, 93 (Fig. 5), at the top, the guide flanges being formed withthe upper fiat seating surfaces 94, and the flange extensions 95 forhousing and supporting the cross-head guides 96, 91. Y

Each cross-head guide comprises a substantial.-

` ly rectangular blockof metal having a V-shaped groove 98 formed on theside toward the crosshead. For convenience in machining these V- shapedgrooves, I provide a rectangular section groove 99, formed at the apexof the V. This is va 'clearance groove machined in vthe guides torelieve pressure at the apex of the V and to concentrate it on the flatsides only.

The block 96 has bores |00 for passing the screw bolts Iwhichsecure'that block xedly .to the spider arm 83. lThe other guide block 91is preferably provided with an enlarged or laterally elongated apertureor slot |02 for receiv- The use of the V-shaped guides enables the useof the adjustment screws |04, which can take up any wear on the guidesor cross-heads in a vertical or horizontal direction, therebyeliminatstub shaft |09, which has a threaded end provided with a nutll0. The opposite end of each crosshead 24 has a vertically extendingattaching flange which is provided with a threaded bore ||2-forreceiving the threaded end ||3 of a connecting rod ||4, which is lockedin place by lock nut |I5.

The intermediate body H5 of each cross-head 24 may be of any convenientshape, provided its lateral edges are provided with flat surfaces ||6,

||1 forming a V-shaped angular edge which is complementary to the shapeof the V-shaped groove in the blocks or guides 96, 91. These edges areaccurately machined to fit the guides, and each of the upper guidesurfaces ||6 is provided with an oil groove ||8, which extendsdiagonally downward across the guide surface IIS, toward each end,from'the middle.

The groove ||8 communicates with a drilled aperture ||9 extending acrossthe body ||5', and a drilled aperture in an upwardly projecting lug |2|communicates with the aperture ||9. The vertical aperture |20 may beused for conducting oil to the oil groove I I8 on the cross-head guidesurface 6. The lower surface ||1 will be lubricated by the gravity flowof lubricant from the upper surface.

- The base |6 has in its upper 'hexagonal portion 16 a bearing plate|22. For this purpose the base portion 16 is provided with an inwardlyextending which receives the outer race of an anti-friction bearing |28.It also has an inwardly extending radial flange |29 to support the race,the main t drive shaft 56, and enlarged portion |30, on which the outerrace of the bearing |28 has a close frictional t. An oil seal plate |3|is mounted on this portion |30 against the annular shoulder |32. The oilseal plate extends over the flange |26, and has grooves filled withpacking |33 to retain the oil in the cup or'bore |21.

The anti-friction bearing |28 may be identical in construction to thatdescribed in detail at 31. 48, 40, except that it is a main supportingbearing for the drive shaft 56, and is necessarily larger xfor thisduty.

The bearing plate |22 has an oil seal plate |34 bolted to its lower ange|29, the oil seal plate being provided with grooves filled with packing|35 in-the aperture or bore which receives the shaft 56.

Horizontal and vertical grooves |36 are drilled in the flange |26 at theleft to provide for oiling vnecessary to drill oil apertures throughparts.

The crank shaft 56 is provided at its upper endI with the crank oreccentric portion |31 which 'supports the vertically extending eccentricor crank pin |38. This crank pin carries a similar anti-friction bearing|39 installed in the same way, and the bearing housing |40 iscylindrical in `shape and has a horizontally extending supporting flange|4| at its lower edge. The bearing is sealed at the bottom by an oilseal |42, and the eccentric pin |38 has a tapered portion |43 and areduced cylindrical portion |44.

The bearinghousing |40'is likewise extended upwardly, having an integralreducedcylindrical portion which supports in a similar way a secondanti-friction bearing |45, which engages the reduced cylindrical portion|44 on the eccentric pin |38. A screw cap |46 encloses the upper end ofthe bearing housing |40 and is provided with an oiling aperture. A nuton the end of eccentric pin |38 secures the inner race on thecylindrical end of the eccentric pin.

The bearing housing |40 supports an annular iloating member |41 which isrotatably mounted on the.l eccentric pin |38 by means of the bearing|39. Floating member |41 has a pair of substantially cylindrical walls|48, |49 joined 'by an annular yoke |50. The inner and outer surfaces ofthese wallsl are machined to cylindrical form, and the walls areconcentric and substantially equal in height. y

The inner surface of wall |48 comprises the cylindrical surface of abore which fits on the cylindrical outer surface of the bearing housing|40, It rests upon the flange |4|, and it may be secured in place bymeans of a cap plate |5|, comprising a cup-shaped member having a borefor passing the upper part of the bearing housing |40 and having adepending annular ange for` engaging the upper edge of wall |48. Thiscap plate |5| may be secured in place by a plurality of screw boltsthreaded into the housing |40.

The eccentric pin |38 is thus provided with an annular track which isrotatably mounted upon the pin |38 and is adapted to provide means foractuating a multiplicity of different pump units.

The stub shaft has at its lower end a cylindrical portion |52, whichengages a plurality of rollers |53 that are contained in the cylindricalbore |54 of a roller |55. Roller |55 has an outer cylindrical surface|56 that fits between the machined cylindrical surfaces on the walls|48, |49 to accommodate the connection to the side sway of the crankaction.

As previously described, each stub shaft |09 is xedly secured in `thecross-head 24 by a nut ||0. `Each stub shaft preferably has an annularshoulder 51 and a roller-retaining ring |58 is seated against thisshoulder and clamped between the cross-head and the annular shoulder|51. The roller |55 may be rabbeted to receive the ring |58.

Stub Ishaft |09 has .a head |59 rotating in a counterbore |60 in thebottom of the roller*` |55. 'Ihe stub shaft |09 preferably hasv atransverse bore 6|, and an axial bore |62 communicating with it, drilledin the shaft for the purpose of permitting the oiling of theanti-friction rollers |53 which fill the annular space between thecylindrical surfaces |52, |54.

It will thus be apparent that the actual rotation takes place at theanti-friction rollers |68, and the only motion occurring between thesurface |56 of roller |55 and the surfaces of the Walls |48, |49 of thefloating member |41 is a minimum. This small amount of motion permitsthe parts to be made by volume production methods at a relatively lowcost.

Referring to Fig. 5, it will be noted that each cross-head 24 isslidably mounted in its guides 96, 91 located between the upwardlyextending legs 93, 94 of a spiderarm 83. The cut-out or slot |63 betweenthe legs of the spider arm 83 at the top providesspace for thecross-heads and their connecting rods. y

The various pumping units 10-15 are all identical in structure, and thisalso serves to reduce the cost of the complete device. Each pump unitcomprises a housing 2| of cast metal, which is adapted to be connectedto the intake valves and output valves and supported by the spider arms83. Thus each housing hasa flat base flange |64 which is spaced from theinner bottom Wall |65 of the pump housing so as to eliminate possibilityof leakage.

The screw bolts 9| pass through the flanges 81 on the spider arm 83, andare threaded into threaded bores in the pump housing flange |64. Thepump housing has a flat flange surface |66 located in a vertical planeat its outer side with respect to the axis of shaft 56, and this surfacesurrunds an intakebore |61.

At its upper end the pump housing 2| has an any attaching ange |68surrounding an output con- I projecting radially outwardly from thecylindrical wallfor the attachment of a diaphragm retaining ring |13.

The diaphragm retaining ring is provided with a flat seating surface |14engaging a complementary surface on the flange |12, and a pluralityofscrewbolts |15 secure the ring to the housing 2| and clamp the edge ofa diaphragm |16. The ring |13 is provided with a groove |11, which iscomplementary in shape to the outer edge and head of the diaphragm |16,but of slightly less depth than the diaphragm, so that when the ring |13is flxedly clamped to the housing 2| the rubber diaphragm wall is firmlyclamped in fluid-tight relation to the housing 2|..

The diaphragm |16 comprises a flexible rubbermember which is suitablyreinforced with fabric and which is premolded to the shape shown inFigs. 1 and 3. It has a pair of substantially parallel attaching flanges|18, |19 located in different planes, and each provided with a laterallyprojecting bead adjacent the edge thereof -for engaging in acomplementary groove in the pump head ring and diaphragm retaining ring.

It also has a curved vintermediate wall porvtion |80, the inner leg ofwhich, as shown in inner edge secured to the pump head 28by. a

y moving other parts.

conduit arms 228-233. Each arm comprises adownwardly and outwardlycurved tube, all of the tubes joining at the point 234, and each tubebeing provided with the radially projecting securing flange 235.

It should be understood that in every case the pipe anges on themanifolds, housings, pump units, etc., are provided with flat endsurfaces to engage complementary flanges and provided with apertures forthe bolts which secure these flanges to adjacent flanges. The aperturein one flange is threaded, and the other one is usually left smooth topassthe bolt, or both apertures may be smooth bores and the bolt maypass throu'gh both and be secured by a nut. A suitable gasket may beprovided between the flanges, or the anges may be machined to-- aliquid-tight t, or the joint may be made water- 238 at each end of thetube, the tube being circu-4 `f lar in section and semi-circular inplan, so that when the flanges 238 are bolted tog-ether in the usualmanner a circular manifold I8 is provided. The manifold has in its upperwall a plurality of outlet conduits bordered by the flanges 239, whichhave iiat seating surfaces for engaging the lower flanges |90 on theintake valve units. In this case the bolts pass through and are threadedinto the flanges 239.

'I'he intake manifold may be provided with one, two, or more intakeports. In the present embodiment I have provided two intake ports 248,24|, each bordered by an attachingA flange of the usual type forsecurement to pipes leading 'to the source of supply of the liquid beingpumped. Where the intake manifold I8 is'made of two sections, it may bemore conveniently applied and removed after the complete machine hasbeen set up, since otherwise it would be impossible to get it over thetop of the machine without re It will-be observed that lead from theintake manifold to the pump units, and for convenience the intake valveunits are designated (Fig. 1) by the numerals 242--241.

'Ihe operation of the diaphragm pump is as fol- Y lows: When the shaftI4 is driven, either by a belt or by a gear motor unit, the verticaldrive shaft 56 is Vrotated at a reduced speed, and the eccentric pin |38moves in an orbit, but also makes one rotation each time the shaft 56rotates. As the pin |38 moves in'its orbit, it causes the floatingmember |41 to move eccentrically, but the floating member |41 need notrotate, as the rotation takes place at the anti-friction bearings |39,|45. Rotation is permissible, however, as the cross-head pins |09 have aroller |55-, which has' a rolling contact againstv the walls |48 and |49of the floating member |41. -There is a very small amount of clearanceallowed in the diameter of the flanges ,|99`

the intake valve units are identical, all of the any part of themachine:

the roller and therefore its rotary movement alternates, rolling in turnagainst the inner surface |48 during the pressure stroke and against theouter surface |49 during the 'suction stroke.

The eccentric movement of the iioating member |41 causes the cross-heads24 to be reciprocated in succession,` and the pump units 2| aretherefore actuated in succession. 'I'he cycle of this diaphragm pumpdoes not have all of its resistancepccurring at one or two points in thecycle, but there is a constant load on the drive shaft of the pump whichis similar to that of a four cycle, twelve cylinder internal combustionengine. When one of the pump units is in the midst of its stroke, atleast two other pump units are being actuated and are part way alongtheir strokes.

The reciprocation of the pump unitheads 23 causes an alternate collapseand expansion of the pump unit walls, including the diaphragms |16. Asthe pump head 23 moves outwardly, expanding the pump chamber, the outputvalves 22 stay closed, but the intake the suction or the pressure of theiiuid, which is acted upon by atmospheric pressure or otherwise. 'Uponreverse motionof the cross-head, the pump chamber is collapsed,whereupon the intake valves 20 close, and the output valves 22 areforced open by the discharge from the pump chamber.

As a result of the actuation ofthe pumps in succession constantly in thesame direction about the circular intake manifold I8, there is aconstant change of the location of a low pressure point in the intakemanifold I 8, and the pointof low pressure rotates with the rotation ofthe shaft 56. It is fundamental`r that liquidilows from a point of highpressure to one of low pressure,

and consequently there is a rotationof the liquid being pumped in thecircular manifold I8. This causes the liquid to keep in suspension anyforeign materials, such as sand, dirt, or other matter that might beinthe liquid being pumped, and the same is true in the case of chemical orfood liquids which have solids entrained withA them.

If desired, a manifold similar to the manifold I8 may be used for thedischarge manifold, but the discharge manifold |9 is preferably of theshape shown, to give a more direct discharge. It is different in designfrom the intake manifold, on account of the fact that the intakemanifold had to be designed to leave spacev for the base I6, Whereas theoutput manifold I9 involved no such restrictions in its design. It willbe observed that in the construction of the present pump the number ofdifferent castings has been reducedl to a minimum; The two sections ofthe intake manifold are identical, all of the valve units are identical,all of the pump units guide units are identical; all of the cross-headsare identical, and all of the arms of the supporting spider areidentical in construction. Therefore, the present pump may fled, becauseitis necessary to carry in stock onlyA one of each of these parts toreplace breakage in The parts need not `be machined so accurately, andmay be manufactured according to volume production methods, because thefloating member |41 permits a considerable latitude of movement'in casesuch movement is rendered necessary due to inaccuracies of manufacture.

'I'he present pump has a substantially constantvalves 20 are opened bythe air preliminary to the use oi' the pump -for retaining ring I8I.Like the retaining ring |18 and the surface.|14, the pump head 23 andretaining ring |8| have engaging flat surfacesand are secured togetherby securing bolts.

The retaining ring |8| also has the rabbeted formation and groovecomplementary to the bead on the inner edge of the diaphragm, and thegroove for the diaphragm in the vring I8| is smaller than the diaphragmso that the diaphragm is clamped as described with respect to the outeredge.

The pump housing has its chamber |82 formed with a rear or outercurved'wall |83, which may be substantially concentric in curvature withthe inner surface |84 of the pump head 28. This provides suicient spacefor the pump head movement with the use of a minimum amount of material.

The pump head comprises a circular cast metal member, having a flatinner face, as described,

and having a centrally located inwardly projecting lug |85 with athreaded bore |88. A connecting rod ||4 has its threaded endv threadedinto the bore |88 and secured by a lock nut |81, the other end of theconnecting rod being secured to a cross-head 24, as previouslydescribed. When the shaft rotates, therefore,

the veccentric pin |88 moves in a circularv path, causing the oatingmember |41 to move in a circular path and causing the cross-heads 241 tobe actuated ina radial direction, inwardly and outwardly. Thecross-heads are actuated outwardly in succession,in the direction inwhich the shaft is rotated. Thus the pump diaphragms are moved outwardlyto collapse the pump chambers |82 in succession, and the diaphragms aremoved inwardly to expand the pump chambers in succession.

All of the valve units, whether they be intake valves`28 or outputvalves 22, may be identical in construction, thereby reducing the costof the device and facilitating volume production of these parts.

Each valve comprises a substantially cylindrical housing |88 (Fig. 3),which is provided at its upper edge with a groove forreceiving a gasket|88. The cylindrical housing |88 merges into a lower tubular conduit |88of reduced size, this conduit being provided with a `flat end seatingsurface and an attaching flange |88 for securement to the intakemanifold I 8.

The valve housing |88 has a laterally projecting ponduit |8| with vanattaching flange |82, with apertures for screw bolts so that it may besecured to the intake conduit |61 of a pump unit. Valve housing |88 hasasubstantially cylindrical chamber and an annular shoulder |83 at itslower end. The wall o1' the intake conduit |88 "is rabbeted to receive acylindrical flange |84 carried by a valve seat member |85. Thevalvefseat member |85 hasa ,radially extending body which engages Atheannular shoulder |88, and it is provided with a centrally located bore|86 surrounded by a partially spherical seat |81 to be engaged by a ballvalve |88.

'I'he ball valves |88' comprise rubber covered' metal cores, the ymetalcore comprising three-l fourths of the radius` and lthe rubber coveringcomprising substantially one-fourth of the radius of the ball. They are,of course, heavier than the liquid which is to be pumped so that v 'theywill Ynot iloat in the liquid, and they seat by virtue of gravity, butcan be unseated by the pressure of air when the pump is pumping outpumping the liquid.

The valve seat member. |85 has a fairly close -t in the complementaryformation in the chamber |88, but it is removable and is held in` placeby a cage |88. The cage |88 has a flat bottom 288, which engages thefiat top of the valve seat member |85. It has a plurality of upwardlyextending partially cylindrical joined at -the bottomby an the top by anannulus 283. y a groove for-receiving a gasket 284.

annulus 282 and at The gasket 284 is not for'the purpose of effecting aliquidtight seal, but lit is resilient and is for the .purpose ofplacing a resilient pressure on the cage |88 to hold the valve seatmember |85 in place.

The spaces 285 between the frame membersv 28| are cut out to permitvfree flow of liquid, and the cage is so arranged that one of the spaces285 comes directly opposite the discharge openframe members 28| The topring 283 has ing |8I. 'To assure this location, the cage y |88 may havea pin at the top which iits in a groove in the housing |88 and assures-proper location of the cage with respect to the housing.

The ball |88 is slightly smaller than the cage |88, and the cage is oflsumcient length so that the ball may vrise well off the seat and permitfree ow of the liquid through the valve.v

The cover 288 (right, Fig. 3) comprises a cast metal member having anannular depending flange 281 that fits inside the annulus 288 of thecage |88. It extends out over both the packings |88 and 284, the formerserving to provide a fluid-tight seal between the cover and the valvehousing |88, and the latter serving to permit the cover to secure'thecage in place.

'I'he cover plate 288 is preferably provided with a pair of upwardlyextending lugs 288 which are apertured to receivea pin 288 for pivotallysupporting a locking lever 2I8. The pin 288 may be secured in place bycotters at each end, and the lever 2|8 is also pivotally supported bythe two legs 2|| of its forked end (Fig. l), which are mounted on a stubshaft 2I2 (Fig. 2) carried by link 2|3. Link 2|8 is pivotally secured tothe housing |88 by a stub shaft 2 I4, which is mounted in a pair oflaterally projecting lugs 2I5.

At the oppositeV side of each valve housing (upper left, Fig. 2), thehousing is provided with ly between the forked ends 2|8 at that end of.the

lever 2|8, and a wing nut 228, provided with elongated hand rods, ismounted on the threaded end of the rod 2|8 to engage the lever 2 I8.Thus the cover plate 288 may be forced down tightly by screwing the wingnut 228 downward on the rod .2I8. It is a very simple matter, however,to loosen the cover by turning the wing nut 228 in aleft-hand directionand then pivoting the .lever 2|8 outward with respect to the legs 2|8.All of the valve housings have the same type of cover plate and otherdetails of construction, and therefore further description isunnecessary.

Such a valve housing is mounted with its intake conduit |88 connected tothe outlet conduit |68 of each pump unit 18-15. Such a valve I housingis also provided for each inlet conduit load on the shaft and produces asubstantiallyconstant flow of liquid. Pumps are already beingmanufactured which are' designed to pump against a head of 80 feet witha safety factor of 5.

The floating eccentric permits comparatively y close and directconnections and eliminates expensive and .complicated rods that wouldotherwise benecessary to drive six independent means from .asinglefpiri. It also provides uniform movement for each of the sixunits, which-it is I diicult to arrange with'conn'ecting rods,especially ii' they operate in a common plane.

Any of the driven members may be removed in a very simple manner, due tothe simple con'- struction of the floating membenand much wear on thecross-head rollers is eliminated byme'ans `Aof the floating eccentricmember, the rotation taking place on the roll/er bearings at theeccentric pin. The diaphragms of the pump units may also beremoved veryeasily, and replaced,

without taking'down any other part of the pump,

by merely removing the bolts which securethe diaphragms in place.

While I have illustrated a preferred embodiment of my invention, manymodifications may be made without departing from the spirit of theinvention, and I do not wish'to be limited to the precise details ofconstruction set forth, but de- .sire to avail myself of allchangeswithinthe scope i of theappende'd claims.

Having -thus described my-invention. what I l claim as new and ldesireto secure by Letters Patent of the United Stateais:v 1

1. In a diaphragm pump, the combination of a driving member with amultiplicity ofdiaphragnl pump units arranged about said drivingmember,said driving member having a floating member carried eccentricallythereby, and a multilplicity of different actuating means, including oneforeach pump unit, said actuating means being driven by.. said floatingmember 'in succession, thereby distributing load ofsaid multiplicity ofpumps throughout v-the cycle of said lfloating member, said pump unitsbeing connected to an.

intake manifold comprising a conduit 'having a closed circuit wherebythe actuation of the pumps in successionjcauses rotary flow of theliquid being pumped in said intake manifold to prevent the settlement ofsediment in the manifold.

2. In a diaphragm pump, the combination of a driving memberv with amultiplicity of diaphragm pump units arranged about'said driving member,said driving member having, a'floating member carried eccentricallythereby, and a multiplicityA of different actuating means, including onefor each pump unit, said I'actuating means being driven by said floatingmember in succession, thereby distributing the load of said multiplicityl of pumps throughout thecycle of said floating member, said pump unitsbeing connected to a streamline discharge manifold having a commondischarge port connected to a multiplicity of radially extendingdischarge conduits including one conduit for each pump unit.

3. In a diaphragm pump, the combination of a centrally located base witha multiplicity of radially extending arms carried by said base, each ofsaid arms supporting' a pumpunit with intake and output valves, drivingmeans carried by said base and 'connected to each of said pump units,and intake and output man'ifolds connected to the pump units throughsaid valves, one of said 14) manifolds comprising a closed circuitconduit ernbracing said base and having spaced inlets and spaced outletsto provide a gyratory action in saidy conduit preventing settlement ofsediment.

and the other of said manifolds vcomprising a 1,-,

centrally located conduit joined to a multiplicity of radially extendingconduit arms connecting with the pump units through the valves. I 4. Ina diaphragm pump, the combination of a centrally located hollow base,said base being pro- 2o lvided with a laterally projecting drive shaftfitting havingbearings for a drive shaft, a drive shaft in said bearingsand provided with a bevel pinion, a second bearing fitting mounted insaid base andeffecting a closure of the open bottom of said base, 2,-,

said second bearingiitting being provided with a bearing for a verticalshaft, a vertical shaft in saidy bearing, and a crown gear carried bysaid l vertical shaft for meshing with said bevel pinion,

said hollowbasehaving a supply'of lubricant for 30 immersing said bevelpinion and crown gear and having access to said bearings,v a pluralityof. radially extending supporting' arms carried by said base, each ofsaidarms being provided withcross head guides,v a crank carried by saidver- 3;,

tical shaft and having a crank pin provided with a bearing forsupporting-A a floating annulus, said annulus being rotatably\mounted onsaid crank pin and having an annular groove therein, a plurality ofradially extending links, each link hav- 404 ing a bearing extendinginto said annular groove and engaging the opposite sides thereof, crossheads carried by said. links for guiding there# ciprocatingmotion ofsaid links, and diaphragm pumps actuatedby saidjlinks successively when45 said vertical shaft is rotated, said cross-heads preventing tiltingof said diaphragm pumps.

5. In a diaphragm pump, the combination of `a centrally located hollowbase, said base being provided with a laterally projecting drive'shaft50v ntting having bearings for a. drive shaft,- a drive shaft in saidbearings and provided with a bevel pinion, a-second bearing ilttingmounted in said base and effecting a closure of the open bottom of saidbase, said second bearing fitting being` provided with a bearing foravertical shaft, a

vertical shaft in said bearing, and a crown gear l carried bysaidvertical shaft for meshing with said bevel pinion, said hollow basehaving a supvply of lubricant for immersing said bevel pinion and crowngear and having access to said bearings, a.plurality of radiallyextending supporting arms carried by said base, each of said arms lbeingprovided with' cross head guides, a crank carried by said vertical shaftand having a crank l pin provided with. a bearing for supporting afloating annulus, said annulus being rotatably y mounted on said crankpin and having an annular groove therein, a plurality of radiallyextending links, each link having a bearing'extend- 70 ing into saidannular groove and engaging the opposite' sides thereof, cross headscarried by said links for guiding the reciprocating motion of said'links, and diaphragm pumps actuated bysaid links successively when saidvertical shaft is roshaftin said bearings and provided with a bevelpinion, a second bearing fitting mounted in said base and eiecting aclosure of the open bottom of said base, said second bearing fittingbeing prolvided with a bearing for a vertical shaft, a vertical shaft insaid bearing, and a crown gear carried by said vertical shaft formeshing with said bevel pinion, said hollow base having' a supply oflubricant forimmersing said bevel pinion and crown gear and havingaccess to said bearings, a plurality of radially extending supportingarms carried by'said base, each of said arms being provided with crosshead guides, a crank carried by said vertical shaft and having a crankpinprovided with a bearing for supporting a floating annulus, saidannulus being rotatably mounted. on said crank pin and having an annulargroove therein, a plurality of radially extendinglinks, each link havinga bearing extending into said annular groove and engaging the oppositesides thereof, cross heads carried by said links for guiding thereciprocating motion of said links,

and diaphragm pumps actuated by said links successively when saidvertical shaft is rotated, said diaphragm pumps comprising a pluralityof separate units carried by said radial` arms, and communicating attheir intakes with an v annular closed circuit manifold havingcircumferentially spaced intake apertures, whereby a rotating cur' rentis caused in said manifold to prevent the deposit of entrained solids,said diaphragm pumps communicating at their outlets with a streamlinedoutlet manifold comprising a plurality of conduits of same shape andlength joined to a centrally located discharge outlet conduit. y

7. In a diaphragm pump, the combination of a vertically extending driveshaft with a supporting base having a plurality of radially extendingsupporting arms, a plurality of diaphragm pump' units, one of said unitsbeing canied by each of said arms, a crank having a vertically extendingcrank pincarried by the end` of said drive shaft and having a bearingfor engaging a floating annulus, said annulus being rotatably mountedon,. said crank pin and having a pair of-'annular opposed walls, crosshead guides carried by said radially projecting arms and having crossheads slidably mounted in said guides for radial movement,

ananas connecting rods for connecting said cross heads to the diaphragmsof said pumps, rigid links for connecting said cross heads totransversely extending bearings, said bearings being located between theopposed walls of said annuluswhereby 'the diaphragm pumps are actuatedin succession,

and a closed circular conduit having symmetrically located intakeapertures and having outlets to each of said pumps, serving as amanifold l and having a bearing for engaging a oatingannulus, saidannulus being rotatably mounted on said crank pin and having a pair ofannular opposed walls, cross head guidescarried by said I radiallyprojecting arms and having cross heads slidably mounted in said guidesfor radial movement, connectingrods for connecting said cross heads tothe diaphragms of said pumps, rigid links for connecting said crossheads to transversely extending bearings to prevent tilting of said dia`phragms, said bearings being located between the opposed walls of saidannulus, wherebythe diaphragm pumps are actuated in succession, and aclosed circular conduit having symmetrically located intake aperturesand having outletsto each of said pumpsserving as a manifold wherebysaid manifold is provided with a rotating current to prevent the depositof entrained solids, said diaphragm pumps communicating at their outletswith a manifold having a centrally disposed-outlet and having aplurality of similarly shaped let. y

streamlined conduits leading to said out- 9. In a diaphragm pump, thecombination cfa output valves, rotary driving means 'connected to Aeachof said pump. units t actuate same in a continuous and successiveorderaround said driving means, and intake and output manifolds con- Nagyratory action of the uid passing through said intake manifold iacooperation with the o'peration of said pump units to prevent settlementof sediment in said intake manifold. Y'

n H. 4LOGAN.

